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Rochester biotech startup Thermal Gradient says it has invented a device that could make it easier to get treatment to millions of AIDS victims in underdeveloped parts of the world and provide early warning of an attack by an airborne biological weapon.

The new technology reduces the time needed to perform DNA testing from hours to minutes, said Bob Juncosa, Thermal Gradient's chief technology officer.

Thermal Gradient was started by Juncosa and Joel Grover, chief executive officer. Both were managers at Ortho-Clinical Diagnostics until 2004, when they were laid off. Since 2008, ...